Machine Screw Nuts On Sales Systems Ltd.

Made in U.S.A.

Machine screws nuts manufactured domestically by Amerifast Corp. and MRL Mfg.

All nuts are made of 304 Stainless and are stamped with Robbins "R" trademark and "304AN"; AN stands for annealed. Chemicals and physicals showing conformance to MS specifications are available on all items.

Material to procurement spec FF-N-836; Fed Std 66; QQ-S-763.
Passivated to QQ-P-35.
Dimensions, proof load, hardness, threads to MS specs, procurement spec FF-N-836; Fed Std H28/2; Fed Std H28/20 system 21; ANSI B18.2.2.
Magnetic permeability to procurement spec FF-N-836.
Quality assurance to procurement spec FF-N-836; Mil Std 105.

Item #	Description	Thread Size	Stamping	Codes and Standards
item-6252	N/A Finished Nut, 1/4-20	N/A 1/4-20	N/A -1	N/A MS 51971
item-6258	N/A Finished Nut, 1/4-28	N/A 1/4-28	N/A -1	N/A MS 51972
item-6253	N/A Finished Nut, 5/16-18	N/A 5/16-18	N/A -2	N/A MS 51971
item-6259	N/A Finished Nut, 5/16-24	N/A 5/16-24	N/A -2	N/A MS 51972
item-6247	N/A Machine Screw Nut, 10-24	N/A 10-24	N/A -204	N/A MS 35649
item-6243	N/A Machine Screw Nut, 2-56	N/A 2-56	N/A -224	N/A MS 35649
item-6248	N/A Machine Screw Nut, 1/4-20	N/A 1/4-20	N/A -2254	N/A MS 35649
item-6249	N/A Machine Screw Nut, 5/16-18	N/A 5/16-18	N/A -2314	N/A MS 35649
item-6250	N/A Machine Screw Nut, 3/8-16	N/A 3/8-16	N/A -2384	N/A MS 35649
item-6244	N/A Machine Screw Nut, 4-40	N/A 4-40	N/A -244	N/A MS 35649
item-6245	N/A Machine Screw Nut, 6-32	N/A 6-32	N/A -264	N/A MS 35649
item-6246	N/A Machine Screw Nut, 8-32	N/A 8-32	N/A -284	N/A MS 35649
item-6254	N/A Finished Nut, 3/8-16	N/A 3/8-16	N/A -3	N/A MS 51971
item-6260	N/A Finished Nut, 3/8-24	N/A 3/8-24	N/A -3	N/A MS 51972
item-6251	N/A Machine Screw Nut, 10-32	N/A 10-32	N/A -304	N/A MS 35650
item-6255	N/A Finished Nut, 1/2-13	N/A 1/2-13	N/A -5	N/A MS 51971
item-6261	N/A Finished Nut, 1/2-20	N/A 1/2-20	N/A -5	N/A MS 51972
item-6256	N/A Finished Nut, 5/8-11	N/A 5/8-11	N/A -7	N/A MS 51971
item-6257	N/A Finished Nut, 3/4-10	N/A 3/4-10	N/A -8	N/A MS 51971

Item #

Description

Thread Size

Stamping

Codes and Standards

item-6252

N/A Finished Nut, 1/4-20

N/A 1/4-20

N/A -1

N/A MS 51971

item-6258

N/A Finished Nut, 1/4-28

N/A 1/4-28

N/A -1

N/A MS 51972

item-6253

N/A Finished Nut, 5/16-18

N/A 5/16-18

N/A -2

N/A MS 51971

item-6259

N/A Finished Nut, 5/16-24

N/A 5/16-24

N/A -2

N/A MS 51972

item-6247

N/A Machine Screw Nut, 10-24

N/A 10-24

N/A -204

N/A MS 35649

item-6243

N/A Machine Screw Nut, 2-56

N/A 2-56

N/A -224

N/A MS 35649

item-6248

N/A Machine Screw Nut, 1/4-20

N/A 1/4-20

N/A -2254

N/A MS 35649

item-6249

N/A Machine Screw Nut, 5/16-18

N/A 5/16-18

N/A -2314

N/A MS 35649

item-6250

N/A Machine Screw Nut, 3/8-16

N/A 3/8-16

N/A -2384

N/A MS 35649

item-6244

N/A Machine Screw Nut, 4-40

N/A 4-40

N/A -244

N/A MS 35649

item-6245

N/A Machine Screw Nut, 6-32

N/A 6-32

N/A -264

N/A MS 35649

item-6246

N/A Machine Screw Nut, 8-32

N/A 8-32

N/A -284

N/A MS 35649

item-6254

N/A Finished Nut, 3/8-16

N/A 3/8-16

N/A -3

N/A MS 51971

item-6260

N/A Finished Nut, 3/8-24

N/A 3/8-24

N/A -3

N/A MS 51972

item-6251

N/A Machine Screw Nut, 10-32

N/A 10-32

N/A -304

N/A MS 35650

item-6255

N/A Finished Nut, 1/2-13

N/A 1/2-13

N/A -5

N/A MS 51971

item-6261

N/A Finished Nut, 1/2-20

N/A 1/2-20

N/A -5

N/A MS 51972

item-6256

N/A Finished Nut, 5/8-11

N/A 5/8-11

N/A -7

N/A MS 51971

item-6257

N/A Finished Nut, 3/4-10

N/A 3/4-10

N/A -8

N/A MS 51971