PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILD52121Drill,pneumatic,sinker

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 3820-00-935-7808 · FSC 3820 · No Item Name Available
Verified by PartsTable
NSN 3820-00-935-7808 — this item is cataloged by the U.S. Government under National Stock Number 3820-00-935-7808. Primary manufacturer part number: MILD52121.
Features
  • Drill,pneumatic,sinker — FSC 3820
  • Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY USAGE DESIGN,WEIGHT,ROD SHANK TYPE,ROD SHANK CROSS-SECTIONAL SHAPE,WIDTH ACROSS FLATS,ROD SHANK LENGTH
  • Rod Shank Type: COLLARED
  • Rod Shank Cross-Sectional Shape: HEXAGONAL
  • Usage Design: DRY
  • Rod Shank Length: 4.250 INCHES NOMINAL IN
  • Width Across Flats: 1.000 INCHES NOMINAL IN
  • Nondefinitive Spec/std Data: 2 CLASS
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Drill,pneumatic,sinker, cataloged under National Stock Number 3820-00-935-7808, is classified within Federal Supply Class 3820 (No Item Name Available) of the Construction, Mining, Excavating Equipment group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, 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
NSN3820-00-935-7808
Primary Part NumberMILD52121
Item NameDrill,pneumatic,sinker
FSC / FSG3820 / 38 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Reference Number Differentiating CharacteristicsAS DIFFERENTIATED BY USAGE DESIGN,WEIGHT,ROD SHANK TYPE,ROD SHANK CROSS-SECTIONAL SHAPE,WIDTH ACROSS FLATS,ROD SHANK LENGTH
Rod Shank TypeCOLLARED
Rod Shank Cross-Sectional ShapeHEXAGONAL
Usage DesignDRY
Rod Shank Length4.250 INCHES NOMINAL IN
Width Across Flats1.000 INCHES NOMINAL IN
Nondefinitive Spec/std Data2 CLASS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3820-00-020-5300WS45 INTERCHANGEABLE
Drill,pneumatic,sinker
Curtiss-Wright Electro-Mechanical Corporation Div Epd
4320-00-147-0265J40 INTERCHANGEABLE
Shaft,transmission,pump
Circor Naval Solutions Llc Dba Warren Pumps
5310-00-202-4182J40 INTERCHANGEABLE
Washer,flat
Dixon Valve & Coupling Company, Llc Div Dixon Fire
3820-00-275-2610 INTERCHANGEABLE
Drill,pneumatic,sinker
3820-00-275-2614 INTERCHANGEABLE
Drill,pneumatic,sinker
3820-00-275-2615 INTERCHANGEABLE
Drill,pneumatic,sinker
3820-00-383-3718APT22D INTERCHANGEABLE
Drill,pneumatic,sinker
Industrial Power Tool & Repair Incorporated
3820-00-389-7785 INTERCHANGEABLE
Drill,pneumatic,sinker
3820-00-410-4439 INTERCHANGEABLE
Drill,pneumatic,sinker
3815-00-591-1954 INTERCHANGEABLE
Core Assy,tagline
Cross-Reference Index
Part NumberManufacturer
MILD52121 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
J40 Ingersoll Rand Co Athens Plant (USA)
Related Parts
3820-00-020-5300INTERCHANGEABLE
DRILL,PNEUMATIC,SINKER
WS45
4320-00-147-0265INTERCHANGEABLE
SHAFT,TRANSMISSION,PUMP
J40
5310-00-202-4182INTERCHANGEABLE
WASHER,FLAT
J40
3820-00-275-2610INTERCHANGEABLE
DRILL,PNEUMATIC,SINKER
3820-00-275-2614INTERCHANGEABLE
DRILL,PNEUMATIC,SINKER
3820-00-275-2615INTERCHANGEABLE
DRILL,PNEUMATIC,SINKER
3820-00-383-3718INTERCHANGEABLE
DRILL,PNEUMATIC,SINKER
APT22D
3820-00-389-7785INTERCHANGEABLE
DRILL,PNEUMATIC,SINKER
3820-00-410-4439INTERCHANGEABLE
DRILL,PNEUMATIC,SINKER
3815-00-591-1954INTERCHANGEABLE
CORE ASSY,TAGLINE
5930-00-644-2829INTERCHANGEABLE
SWITCH,PRESSURE
614065-02
3820-00-688-9995INTERCHANGEABLE
DRILL,PNEUMATIC,SINKER

Frequently Asked Questions

What is NSN 3820-00-935-7808?

NSN 3820-00-935-7808 is a Drill,pneumatic,sinker, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 3820 (No Item Name Available). Status: active.

What are the part numbers for NSN 3820-00-935-7808?

NSN 3820-00-935-7808 has 2 cross-referenced part numbers: MILD52121 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), J40 (Ingersoll Rand Co Athens Plant).

What NSN replaces 3820-00-935-7808?

There are 12 known substitutes for 3820-00-935-7808: 3820-00-020-5300, 4320-00-147-0265, 5310-00-202-4182 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILD52121?

Key specifications for MILD52121: Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY USAGE DESIGN,WEIGHT,ROD SHANK TYPE,ROD SHANK CROSS-SECTIONAL SHAPE,WIDTH ACROSS FLATS,ROD SHANK LENGTH; Rod Shank Type: COLLARED; Rod Shank Cross-Sectional Shape: HEXAGONAL; Usage Design: DRY. 8 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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