The Guide To Understanding P1 Fastener Part Numbers

Jun 25
2 min read

A Quick Guide to Decoding Your High-Performance Fastener Kits

At P1 Manufacturing, 99.9% is simply not good enough – we believe that the details down to the .1 make all the difference. To help you easily identify, re-order, and understand our high-precision fastener kits, we use a structured part numbering language that tells you exactly what is inside the box.

Here is how to decode a typical P1 Fastener Kit Part Number, using K003-H02E as an example:

K003-H02E

Part Number Breakdown

1. Kit Designator (K)

What it means: Every complete package begins with K, which simply designates it as a Kit.

2. Engine Family (003)

What it means: The first three numerical digits identify the specific engine family the kit is engineered to fit.
Example: 003 is dedicated to the Chevrolet LS Series.

3. Product Type (H)

What it means: Located directly after the hyphen, this letter indicates the specific application or product type within the engine.

Code	Product Type
H	Head Studs
HB	Head Bolts
M	Main Studs
C	Cam Bolts
E	Exhaust Studs
BB	Balancer Bolts
RB	Rod Bolts
CRB	Carb Studs
S	Rocker Studs
A	Accessory Studs

4. Specific Kit Number (02)

What it means: These digits distinguish specific kit variations or configurations within that product type (such as variations in model years or stud lengths).

5. Material Grade (E)

What it means: The final letter identifies the ultimate tensile strength (UTS) and performance grade of the alloy used. P1 fasteners are manufactured using certified domestic raw materials and heat-treated in-house to meet these exact standards:

Code	Material Series	Ultimate Tensile Strength (UTS)	Standard Finish
E	E190 Series	190,000 psi	Black Oxide
S	S220 Series	220,000 psi	Black Oxide
H	H260 Series	260,000 psi	Plain Finish
P	P270 Series	270,000 psi (Custom Age 625 Plus)	Plain Finish

Engine Family Reference Chart

Refer to this master list to quickly look up your engine family code:

Code	Engine Family / Fitment	Code	Engine Family / Fitment
000	GENERIC/MISC FITMENT	050	HONDA
001	CHEVROLET BB	053	NISSAN
002	CHEVROLET SB	055	OLDSMOBILE
003	CHEVROLET LS SERIES	060	FORD BB
004	CHEVROLET DURAMAX	061	FORD MODULAR (4.6, 5.4)
009	CHEVROLET ACCESSORY	062	FORD COYOTE
020	TOYOTA	063	FORD GODZILLA
030	CHRYSLER BIG BLOCK	064	FORD POWER STROKE
031	CHRYSLER SMALL BLOCK	065	FORD SB
032	CHRYSLER V10	066	FORD IN LINE 6 CYL
033	CHRYSLER HEMI GEN III	067	FORD 4 CYL
034	CHRYSLER 4 CYL	080	CATERPILLAR
035	CHRYSLER IN LINE 6 CYL	081	JOHN DEERE
036	CHRYSLER V6 CYL	082	INTERNATIONAL
040	DODGE	083	CUMMINS HD
044	DODGE CUMMINS	084	KUBOTA
085	BMW	090	AUDI/VW
086	MERCEDES	091	LAMBORGHINI
088	SUBARU	095	YAMAHA
089	MITSUBISHI

Traceability Note: In addition to the kit part number found on the standard packaging, nearly all individual P1 critical engine fasteners have their specific part number and a unique traceability lot number laser-marked directly onto the part. This ensures absolute quality control and flawless tech support if you ever need to re-order.