The Bolt,ribbed Shoulder, cataloged under National Stock Number 5306-01-008-4195, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 23 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-008-4195 |
| Item Name | Bolt,ribbed Shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 1.740 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN |
| Shoulder Length | 0.690 INCHES MINIMUM AND 0.700 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC 1ST TREATMENT RESPONSE AND QQ-P-416,TY 2,CL 2 FED SPEC 2ND TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 2 FED SPEC 3RD TREATMENT RESPONSE AND QQ-Z-325,TY 2,CL 2 FED SPEC 4TH TREATMENT RESPONSE OVERALL |
| Distance From Largest Diameter of Bearing Surface of Head to Ribs | 0.090 INCHES NOMINAL IN |
| Shoulder Diameter | 0.535 INCHES MINIMUM AND 0.540 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.930 INCHES MINIMUM IN |
| Shoulder Shape | RIBBED FIRST SHOULDER |
| Hardness Rating | 78.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 84.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM OVERALL |
| Material Document and Classification | QQ-W-405 FED SPEC 1ST MATERIAL RESPONSE OR ASTM A322 ASSN STD 1ST MATERIAL RESPONSE OR QQ-W-405 FED SPEC 2ND MATERIAL RESPONSE OR ASTM A322 ASSN STD 2ND MATERIAL RESPONSE OR QQ-W-405 FED SPEC 3RD MATERIAL RESPONSE OR ASTM A322 ASSN STD 3RD MATERIAL RESPONSE OR QQ-W-405 FED SPEC 4TH MATERIAL RESPONSE OR QQ-W-405 FED SPEC 5TH MATERIAL RESPONSE OR ASTM A322 ASSN STD 5TH MATERIAL RESPONSE OR QQ-W-405 FED SPEC 6TH MATERIAL RESPONSE OR QQ-W-405 FED SPEC 7TH MATERIAL RESPONSE OR QQ-W-405 FED SPEC 8TH MATERIAL RESPONSE OR ASTM A322 ASSN STD 8TH MATERIAL RESPONSE OVERALL |
| Rib Length | 0.120 INCHES NOMINAL IN |
| Rib Minor Diameter | 0.535 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Rib Major Diameter | 0.550 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OR ZINC AND CHROMATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 1335 OR STEEL COMP 1340 OR STEEL COMP 4037 OR STEEL COMP 4135 OR STEEL COMP 8637 OR STEEL COMP 8640 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNF |
| Rib Quantity | 35 |
| Head Diameter | 0.800 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MS51948-4 | 2/2 Government specification standardization U.S. Government activity |
NSN 5306-01-008-4195 is a Bolt,ribbed Shoulder, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-008-4195: Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 1.740 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN; Shoulder Length: 0.690 INCHES MINIMUM AND 0.700 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC 1ST TREATMENT RESPONSE AND QQ-P-416,TY 2,CL 2 FED SPEC 2ND TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 2 FED SPEC 3RD TREATMENT RESPONSE AND QQ-Z-325,TY 2,CL 2 FED SPEC 4TH TREATMENT RESPONSE OVERALL. 23 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.