GOST 4741-68. Threaded Adapter Bushings for Machine Tool Fixtures. Design and Dimensions

GOST 4741-68

Threaded adapter bushings for machine tool fixtures

Design and dimensions

Effective date: 1969-01-01

Supersedes GOST 4741-57

1. The design and dimensions of threaded adapter bushings conform to those shown in the drawing and table.

Dimensions in mm

Sleeve designation	Application						(limit deviation per h13)		Weight, kg
		1st series	2nd series
7009-0691		M6	-	10	M12×1.25	16.2	14	3	0.007
0692				14					0.010
0693		M8	-	12	M16×1.5	19.6	17	4	0.015
0694				16					0.019
0695		M10	-		M18×1.5	21.9	19		0.023
0696				20					0.028
0697		M12	-	18	M20×1.5	25.4	22	5	0.031
0698				25					0.042
0699		M16	-		M24×1.5	31.2	27	6	0.058
0700				32					0.072
0701		Tr 16×4	-	25					0.061
0702				32					0.076
0703		Tr 16×4 LH	-	25					0.061
0704				32					0.076
0705		M20	-		M30×1.5	41.6	36		0.120
0706				40					0.145
0707		Tr 20×4	-	32					0.123
0708				40					0.149
0709		Tr 20×4 LH	-	32					0.123
0710				40					0.149
0711		M24	-	36	M36×1.5	47.3	41	8	0.195
0712				48					0.249
0713		-	Tr 24×5	36					0.199
0714				48					0.256
0715		-	Tr 24×5 LH	36					0.199
0716				48					0.256
0717		Tr 26×5	-	40					0.196
0718				52					0.246
0719		Tr 26×5 LH	-	40					0.196
0720				52					0.246
0721		-	Tr 28×5	40	M39×1.5	47.3	41	8	0.215
0722				55					0.288
0723		-	Tr 28×5 LH	40					0.215
0724				55					0.288
0725		M30	-	45	M42×1.5	53.1	46	10	0.296
0726				60					0.380
0727		-	Tr 30×6	45					0.303
0728				60					0.394
0729		-	Tr 30×6 LH	45					0.303
0730				60					0.394
0731		Tr 32×6	-	48					0.289
0732				63					0.367
0733		Tr 32×6 LH	-	48					0.289
0734				63					0.367
0735		M36	-	55	M48×1.5	63.5	55	12	0.454
0736				70					0.555
0737		-	Tr 36×6	55					0.463
0738				70					0.567
0739		-	Tr 36×6 LH	55					0.463
0740				70					0.567
0741		Tr 40×6	-	60	M56×2	75.0	65		0.684
0742				80					0.869
0743		Tr 40×6 LH	-	60					0.684
0744				80					0.869
0745		M42	-	60					0.667
0746				80					0.848
0747		M48	-	70	M64×2	85.6	75	14	1.018
0748				95					1.321
0749		Tr 50×8	-	70					0.971
0750				95					1.246
0751		Tr 50×8 LH	-	70					0.971
7009-0752				95					1.246

• When selecting a size, series 1 should be preferred over series 2.

Example of a designation for a threaded adapter bushing with dimensions d=M6, L=10 mm:

Bushing 7009-0691 GOST 4741-68

2. Material — steel grade 45 per GOST 1050-74 (GOST 1050-88 is currently in effect). Replacement with other steel grades having mechanical properties no lower than those of steel grade 45 is permitted.

3. Hardness — HRC 25…30.

4. Unspecified limit deviations of dimensions: holes — H14, shafts — h14, others — per the corresponding tolerance fields.

5. Metric thread — per GOST 24705-81 (GOST 24705-2004 is currently in effect). Tolerance field of external thread — 8g, internal — 7H per GOST 16093-81 (GOST 16093-2004 is currently in effect). Trapezoidal thread — per GOST 9484-81. Thread tolerance field — 8c per GOST 9562-81.

6. Dimensions of undercuts and chamfers for threads — per GOST 10549-80.

7. Coating — chem. oxide prm (coating designation per GOST 9.073-77). By agreement of the parties, other types of protective coatings may be applied.

8. Marking of a batch of bushings of one size on the container or packaging — the product name, its designation, the designation of this standard, and the trademark of the manufacturer.

Appendix (informative): example of application of threaded adapter bushings.