PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21515Screw,shoulder

Aerosonic Llc · NSN 5305-00-135-0974 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-135-0974 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-135-0974. Primary manufacturer part number: 21515.
Features
  • Screw,shoulder — FSC 5305
  • Thread Quantity Per Inch: 56
  • Nominal Thread Diameter: 0.099 INCHES IN
  • Head Style: FLAT CHAMFER
  • Head Diameter: 0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
  • Thread Series Designator: UNF
  • Shoulder Length: 0.138 INCHES MINIMUM AND 0.146 INCHES MAXIMUM FIRST SHOULDER IN
  • Thread Length: 0.097 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,shoulder, cataloged under National Stock Number 5305-00-135-0974, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Aerosonic Llc. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-00-135-0974
Primary Part Number21515
Item NameScrew,shoulder
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerAerosonic Llc
StatusACTIVE
Thread Quantity Per Inch56
Nominal Thread Diameter0.099 INCHES IN
Head StyleFLAT CHAMFER
Head Diameter0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
Thread Series DesignatorUNF
Shoulder Length0.138 INCHES MINIMUM AND 0.146 INCHES MAXIMUM FIRST SHOULDER IN
Thread Length0.097 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
Special Test FeaturesNNONE
Thread Class2A A
Fastener Length0.302 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN
Head Height0.059 INCHES MINIMUM AND 0.061 INCHES MAXIMUM IN
Shoulder ShapeROUND FIRST SHOULDER
Internal Drive StyleSLOT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
9540-00-145-4543 INTERCHANGEABLE
Angle,structural
2040-00-385-931721515 INTERCHANGEABLE
Control
Industrial Technologies and Services Llc
6685-00-567-600321-515 INTERCHANGEABLE
Frame Assy,movement
Horizon Aerospace Llc Dba Magnetics Division
2940-00-986-027651515 INTERCHANGEABLE
Filter Element,fluid
Wix Corp
2920-01-036-750512309000 INTERCHANGEABLE
Parts Kit,ignition Distributor
Borgwarner Pds (anderson), L.l.c.
5998-01-072-2466 INTERCHANGEABLE
Circuit Card Assembly
3010-01-157-423321515 INTERCHANGEABLE
Clutch
Calgon Carbon Uv Technologies Llc Dba Hyde Marine
5342-01-197-920726686 INTERCHANGEABLE
Cup,piston
Hoffman/new Yorker Inc
4320-01-243-9062235045 INTERCHANGEABLE
Pump,transmission
Clark Material Handling Company
5920-01-544-3451S505-3.15R INTERCHANGEABLE
Fuse,cartridge
Cooper Bussmann, Llc Dba Cooper Industries
Cross-Reference Index
Part NumberManufacturer
21515 PRIMARY Aerosonic Llc (USA)
Related Parts
9540-00-145-4543INTERCHANGEABLE
ANGLE,STRUCTURAL
2040-00-385-9317INTERCHANGEABLE
CONTROL
21515
6685-00-567-6003INTERCHANGEABLE
FRAME ASSY,MOVEMENT
21-515
2940-00-986-0276INTERCHANGEABLE
FILTER ELEMENT,FLUID
51515
2920-01-036-7505INTERCHANGEABLE
PARTS KIT,IGNITION DISTRIBUTOR
12309000
5998-01-072-2466INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
3010-01-157-4233INTERCHANGEABLE
CLUTCH
21515
5342-01-197-9207INTERCHANGEABLE
CUP,PISTON
26686
4320-01-243-9062INTERCHANGEABLE
PUMP,TRANSMISSION
235045
5920-01-544-3451INTERCHANGEABLE
FUSE,CARTRIDGE
S505-3.15R
4810-01-545-5115INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
21515-001
2590-01-571-6401INTERCHANGEABLE
RACK,BAGGAGE,VEHICULAR
A601

Frequently Asked Questions

What is NSN 5305-00-135-0974?

NSN 5305-00-135-0974 is a Screw,shoulder, manufactured by Aerosonic Llc, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-135-0974?

NSN 5305-00-135-0974 has 1 cross-referenced part number: 21515 (Aerosonic Llc).

What NSN replaces 5305-00-135-0974?

There are 12 known substitutes for 5305-00-135-0974: 9540-00-145-4543, 2040-00-385-9317, 6685-00-567-6003 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21515?

Key specifications for 21515: Thread Quantity Per Inch: 56; Nominal Thread Diameter: 0.099 INCHES IN; Head Style: FLAT CHAMFER; Head Diameter: 0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN. 14 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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