291-PP20 — PISTON,INTERNAL COMBUSTION ENGIN

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

291-PP20: PISTON,INTERNAL COMBUSTION ENGIN.

PISTON,INTERNAL COMBUSTION ENGIN. Key specifications include diameter: 3.875 INCHES NOMINAL IN, material: ALUMINUM ALLOY, oversize: 0.020 INCHES NOMINAL IN, cut_depth: 1.086 INCHES NOMINAL IN, head_style: CONCAVE, oil_groove: NOT INCLUDED. This part is cataloged in the U.S.

Government catalog under NSN 2805-00-411-3883, 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

291-PP20

NSN: 2805-00-411-3883
FSC: 2805 — Gasoline Reciprocating Engines, Except Aircraft; and Components
CAGE: 74069 — HASTINGS MANUFACTURING CO DIV HASTINGS MANUFACTURING COMPANY (USA)

SPECIFICATIONS

diameter	3.875 INCHES NOMINAL IN
material	ALUMINUM ALLOY
oversize	0.020 INCHES NOMINAL IN
cut_depth	1.086 INCHES NOMINAL IN
head_style	CONCAVE
oil_groove	NOT INCLUDED
skirt_type	SOLID
carbon_groove	NOT INCLUDED
overall_height	3.495 INCHES MINIMUM AND 3.505 INCHES MAXIMUM IN
surface_finish	FINISHED
oil_passage_type	HOLE THIRD RING
pin_hole_bushing	NOT INCLUDED
NSN	2805-00-411-3883

COMPONENT DIAGRAM

KEY FEATURES

•

CARBON GROOVE: NOT INCLUDED

•

RING GROOVE WIDTH: 0.1880 INCHES NOMINAL THIRD RING IN

•

DISTANCE BETWEEN PIN BOSSES: 1.240 INCHES NOMINAL IN

•

RETAINING RING GROOVE: NOT INCLUDED

•

SURFACE FINISH: FINISHED

TECHNICAL CHARACTERISTICS

OVERALL HEIGHT	3.495 INCHES MINIMUM AND 3.505 INCHES MAXIMUM IN
CARBON GROOVE	NOT INCLUDED
RING GROOVE WIDTH	0.1880 INCHES NOMINAL THIRD RING IN
RING GROOVE WIDTH	0.0780 INCHES NOMINAL FIRST RING IN
RING GROOVE WIDTH	0.0780 INCHES NOMINAL SECOND RING IN
DISTANCE BETWEEN PIN BOSSES	1.240 INCHES NOMINAL IN
RETAINING RING GROOVE	NOT INCLUDED
SURFACE FINISH	FINISHED
OIL PASSAGE TYPE	HOLE THIRD RING
DIAMETER	3.875 INCHES NOMINAL IN

OTHER ITEMS IN FSC 2805 — Gasoline Reciprocating Engines, Except Aircraft; and Components

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

2805-00-010-2959 2805-00-066-3426 2805-00-326-0797 2805-00-395-7778 2805-00-422-9321 2805-00-447-9114 2805-00-448-0786 2805-00-561-9463

SUBSTITUTES & CROSS-REFERENCES 1

3886050Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required

Ready to buy 291-PP20?

Compare prices from verified sellers on eBay

Buy on eBay →

As an eBay Partner, PartsTable may earn a commission. Your price is not affected.

FREQUENTLY ASKED QUESTIONS

What is 291-PP20?

291-PP20 is a PISTON,INTERNAL COMBUSTION ENGIN.

What parts can replace 291-PP20?

There is 1 known substitute for 291-PP20: 3886050. Substitute compatibility should be verified for your specific system.

What is the NSN for 291-PP20?

291-PP20 is cataloged in the U.S. Government catalog under NSN 2805-00-411-3883. This indicates validated use in U.S. government and defense supply chains.

Community Feedback

291-PP20 — PISTON,INTERNAL COMBUSTION ENGIN

Request a Quote — 291-PP20