The Screw,close Tolerance, cataloged under National Stock Number 5305-01-132-2175, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-132-2175 |
| Primary Part Number | BM33024V6-18U |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Head Height | 0.115 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN |
| Fastener Length | 1.750 INCHES MINIMUM AND 1.797 INCHES MAXIMUM IN |
| Thread Length | 0.615 INCHES MINIMUM AND 0.682 INCHES MAXIMUM IN |
| Material Document and Classification | NAS621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN |
| Grip Diameter | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | TITANIUM ALLOY UNS R54520 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.756 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| ST3M430V6-18AS | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT271A6-18 | Hi-Shear Corporation (USA) |
| ST3M430V6-18AS | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| BM33024V6-18U PRIMARY | Huck International, Inc (USA) |
| ST3M430V6-18AS PRIMARY | The Boeing Company Div Defense (USA) |
| HT8137-6-18AS PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 110179-6-18AS | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M430V6-18AS | Houston Precision Fasteners I Lp (USA) |
| WC8137-6-18U | West Coast Aerospace, Inc. (USA) |
| WC8137-6-18A | West Coast Aerospace, Inc. (USA) |
| Reference | Meaning |
|---|---|
| BM33024V6-18U | 5/9 Secondary reference U.S. Government activity |
| HT271A6-18 | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| 110179-6-18AS | 5/2 Secondary reference U.S. Government activity |
| HT8137-6-18AS | 5/9 Secondary reference U.S. Government activity |
| 10115319 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5305-01-132-2175 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-132-2175 has 10 manufacturer part numbers on file: ST3M430V6-18AS (Sps Technologies, Llc Dba PB Fasteners), HT271A6-18 (Hi-Shear Corporation), ST3M430V6-18AS (Fastener Innovation Technology, Inc. Dba F I T), BM33024V6-18U (Huck International, Inc), ST3M430V6-18AS (The Boeing Company Div Defense) and 5 more.
Key specifications for BM33024V6-18U: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Head Height: 0.115 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN; Fastener Length: 1.750 INCHES MINIMUM AND 1.797 INCHES MAXIMUM IN. 18 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.