Round Posts Both End Tapped with Wrench Flats, Length Selectable/Configurable

Round post is a common processing component, with the functions of connection, fastening, support, separation and so on, mainly used in various fastening and supporting mechanisms.
At the same time, there are a variety of materials to choose from, allowing it to be widely used in automation, electronics and electrical appliances, medical treatment, communication and other fields.


 

Type					Material	Surface Treatment	D (mm)	L (mm)
L dimension fixed type	L dimension configurable
	Standard	With Wrench Slot Type	Designated thread type	Thread-Specified Type · With Wrench Slot Type
-	E-NETRF	E-NETRS	E-NETF	E-NETS	General Structural Steel or Carbon Steel	-	5 to 50	8 to 1000
E-ETKR	E-ETKRF	E-ETKRS	E-ETKF	E-ETKS		Black Oxide
E-PETR	E-PETRF	E-PETRS	E-PETF	E-PETS		Electroless Nickel Plating
E-SETR	E-SETRF	E-SETRS	E-SETF	E-SETS	Stainless Steel	-

If there are requirements for rust prevention, give priority to products with surface treatment of electroless nickel plating and those made of stainless steel. Please click Rust Prevention Methods
Products made of general structural steel or carbon steel are coated with anti-rust oil.
The female thread may not be surface treated.
Due to female thread processing, the D part of the female thread may sometimes be slightly raised.
There may be grinding gloss marks near the wrench slot on products without surface treatment.
L ≥ M × 2+N × 2
SC ≤ L—L1

■ L dimension fixed type

Part Number		L (Select L (Dimension Fixed))																			M (Coarse Thread)	S	W	ℓ1
Type	D
General Structural Steel or Carbon Steel E-ETKR E-PETR Stainless Steel E-SETR	6	15	20	25	30	35	40	45	50												3	3.5	5	8
	8		20	25	30	35	40	45	50	60	70	80	90	100	110	120	130	140	150		4	6	7
	10		20	25	30	35	40	45	50	60	70	80	90	100	110	120	130	140	150	200	5	6	8
	12			25	30	35	40	45	50	60	70	80	90	100	110	120	130	140	150	200	6	7.5	10	10
	15					35	40	45	50	60	70	80	90	100	110	120	130	140	150	200	8	10	13
	20						40	45	50	60	70	80	90	100	110	120	130	140	150	200	10	15	17

■ L Size Specification Type / L Size Specification·With Wrench Slot Type

Part Number			L Can be specified down to 0.5mm increments	SC Specified unit: 1 mm Only for models with wrench slot	M (Coarse Thread)	W	ℓ1
Type		D
L Size Specification Type General Structural Steel or Carbon Steel E-NETRF E-ETKRF E-PETRF Stainless Steel E-SETRF	L Size Specification·With Wrench Slot Type General Structural Steel or Carbon Steel E-NETRS E-ETKRS E-PETRS Stainless Steel E-SETRS	6	8 to 100	0 to 42	3	5	8
		8	10 to 200	0 to 142	4	7
		10	15 to 400	0 to 342	5	8
		12	25 to 500	0 to 390	6	10	10
		15	25 to 600	0 to 490	8	13
		20	30 to 600	0 to 490	10	17
		25	40 to 700	0 to 590	12	22
		30	50 to 800	0 to 685	16	27	15
		*40	60 to 1000	0 to 880	20	36	20
		*50	75 to 1000	0 to 980	24	41

Female threads with L ≤ M × 4 are through holes. When L ≤ (M × 2+5)+(M × 2+5), the thread bottom hole may penetrate through.
*D ≥ 40 is only applicable to E-N□□□□, E-E□□□□, and E-P□□□□.

■ Thread Configurable / Thread Configurable, With Wrench Flats

Part Number			L Can be specified down to 0.5mm increments	SC Specified unit: 1 mm Only for models with wrench slot	M·N (Coarse Thread) Selection											W	ℓ1
Type		D
Thread Specification General Structural Steel or Carbon Steel E-NETF E-ETKF E-PETF Stainless Steel E-SETF	Thread-Specified Type · With Wrench Slot General Structural Steel or Carbon Steel E-NETS E-ETKS E-PETS Stainless Steel E-SETS	6	15 to  100	0 to 42		3	4									5	8
		8	15 to 200	0 to 142		3	4	5								7
		10	20 to 400	0 to 342		3	4	5	6							8
		12	25 to 500	0 to 390			4	5	6	8						10	10
		15	30 to 600	0 to 490				5	6	8	10					13
		20	40 to 600	0 to 490				5	6	8	10	12				17
		25	50 to 700	0 to 590				5	6	8	10	12	16			22
		30	60 to 800	0 to 685				5	6	8	10	12	16	20		27	15
		*40	75 to 1000	0 to 880						8	10	12	16	20	24	36	20
		*50	75 to 1000	0 to 980							10	12	16	20	24	41	20

L ≥ M × 2+N × 2 When SC ≤ M × 3, W-M must be ≥ 2. Additionally, when L-SC ≤ N × 3, W-N ≥ 2 must be satisfied.
*D ≥ 40 is only applicable to E-N□□□□, E-E□□□□, and E-P□□□□.

L size tolerance is usually
L8–300±0.2
L300.5–600±0.3
L600.5–1000±0.4

Feature 1: the length and thread of the round post can be freely specified to accommodate different operating environments.
Feature 2: a variety of materials to choose from: general structural steel, stainless steel, aluminum, brass, resin, etc.
Feature 3: a wide range of surface treatments are available to meet the requirements of various industries: ferroferric oxide protective film (blackening treatment), electroless nickel plating, etc.
Feature 4: products with surface treatment (electroless nickel plating) and material (stainless steel) for good anti-rust performance are widely used in precision equipment and dust-free environment.
Feature 5: with the main functions of connection, fastening, support and separation, it is often used in mechanisms with various frames as a connection and support component.

(1) Fastening method of post
The post is generally fastened by torque method. For bolts, fasten them within the range of fastening torque, otherwise excessive torque will cause thread fracture.
(2) Anti-rust specification selection and maintenance
. If there are requirements for anti-corrosion performance, select products with surface treatment of electroless nickel plating or those made of stainless steel (stainless steel) when choosing general structural steel products.
General structural steel posts without surface treatment are recommended to be stored in a constant-temperature and dry environment, and regularly applied with anti-rust oil for maintenance.