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BACW20A219 — FASTENER,POSITIVE LOCK

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

BACW20A219: FASTENER,POSITIVE LOCK.

The FASTENER,POSITIVE LOCK is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY STUD, head_diameter: 0.548 INCHES NOMINAL IN, shoulder_height: 0.062 INCHES NOMINAL IN, undercut_length: 0.080 INCHES NOMINAL IN, surface_treatment: ANODIZE RECEPTACLE MECHANISM, undercut_diameter: 0.396 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-855-2948, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
BACW20A219
NSN: 5325-00-855-2948
FSC: 5325 — Fastening Devices
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY STUD
head_diameter0.548 INCHES NOMINAL IN
shoulder_height0.062 INCHES NOMINAL IN
undercut_length0.080 INCHES NOMINAL IN
surface_treatmentANODIZE RECEPTACLE MECHANISM
undercut_diameter0.396 INCHES NOMINAL IN
end_overall_length0.377 INCHES NOMINAL IN
mounting_hole_typeCOUNTERSUNK
major_diameter_length0.137 INCHES NOMINAL IN
positive_lock_stud_head_styleSTUD HEAD
positive_lock_receptacle_styleRECEPTACLE
positive_lock_stud_shank_styleSTUD SHANK
NSN5325-00-855-2948
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BACW20A219 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
UNDERCUT LENGTH: 0.080 INCHES NOMINAL IN
•
UNDERCUT DIAMETER: 0.396 INCHES NOMINAL IN
•
POSITIVE LOCK STUD SHANK STYLE: STUD SHANK
•
MAJOR DIAMETER LENGTH: 0.137 INCHES NOMINAL IN
•
DISTANCE FROM STUD HOLE CENTER TO MOUNTING HOLE CENTER: 0.938 INCHES NOMINAL IN
•
SHOULDER HEIGHT: 0.062 INCHES NOMINAL IN
•
DISTANCE FROM STUD HOLE CENTER TO MOUNTING HOLE CENTER ALONG LENGTH: 1.125 INCHES NOMINAL IN
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG WIDTH: 1.875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
UNDERCUT LENGTH0.080 INCHES NOMINAL IN
UNDERCUT DIAMETER0.396 INCHES NOMINAL IN
POSITIVE LOCK STUD SHANK STYLESTUD SHANK
MAJOR DIAMETER LENGTH0.137 INCHES NOMINAL IN
DISTANCE FROM STUD HOLE CENTER TO MOUNTING HOLE CENTER0.938 INCHES NOMINAL IN
SHOULDER HEIGHT0.062 INCHES NOMINAL IN
DISTANCE FROM STUD HOLE CENTER TO MOUNTING HOLE CENTER ALONG LENGTH1.125 INCHES NOMINAL IN
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG WIDTH1.875 INCHES NOMINAL IN
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG LENGTH2.250 INCHES NOMINAL IN
END OVERALL LENGTH0.377 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
295306Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
AR5T5Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is BACW20A219?
BACW20A219 is a FASTENER,POSITIVE LOCK.
What parts can replace BACW20A219?
There are 2 known substitutes for BACW20A219: 295306, AR5T5. Substitute compatibility should be verified for your specific system.
What is the NSN for BACW20A219?
BACW20A219 is cataloged in the U.S. Government catalog under NSN 5325-00-855-2948. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.