The Bolt,shear, cataloged under National Stock Number 5306-01-221-8693, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Acufast Aircraft Products. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-221-8693 |
| Primary Part Number | SS5211-7-22 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Acufast Aircraft Products |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Extended Washer Thickness | 0.089 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Head Height | 0.425 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN |
| Fastener Length | 2.153 INCHES MINIMUM AND 2.185 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2401-3 ASSN STD 1ST TREATMENT RESPONSE AND QQ-P-416,TY 2 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Thread Length | 0.768 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-8844 CL 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Features Provided | CASEHARDENED |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.375 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN |
| Width Between Flats | 0.5000 INCHES NOMINAL IN |
| Grip Diameter | 0.4360 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 4340 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| SS5211-7-22 | Acufast Aircraft Products (USA) |
| SS5211-7-22 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| SS5211-7-22 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| SS5211-7-22 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| SS5211-7-22 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| SS5211-7-22 | 3/2 Design control — primary reference U.S. Government activity |
| SS5211-7-22 | 5/2 Secondary reference U.S. Government activity |
| SS5211-7-22 | 7/2 Vendor item drawing reference Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
NSN 5306-01-221-8693 is a Bolt,shear, manufactured by Acufast Aircraft Products, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-221-8693 has 5 manufacturer part numbers on file: SS5211-7-22 (Acufast Aircraft Products), SS5211-7-22 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), SS5211-7-22 (M.s. Aerospace Inc. Dba Ms Aerospace Inc), SS5211-7-22 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), SS5211-7-22 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for SS5211-7-22: Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Extended Washer Thickness: 0.089 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN; Head Height: 0.425 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN. 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.